Description

tert-Butyl-3,6,9,12,15,18,21-Heptaoxa-34-Keto-33-Thiapentatriacontanoate is a specialized functionalized polyether-thioester compound designed for advanced material synthesis. Its molecular architecture, featuring a tert-butyl ester terminus, a long poly(ethylene glycol) (PEG) spacer, and a thioester linkage, makes it a valuable versatile building block for creating custom polymers and surface modifiers. This product is essential for R&D and production teams in industries requiring precise control over material properties such as hydrophilicity, biocompatibility, and reactivity. Its primary applications are found in the development of pharmaceutical intermediates, bioconjugation linkers, and functional polymers for high-performance coatings and hydrogels.

Application

• Pharmaceutical Intermediate: Serves as a key synthon for constructing prodrugs or active pharmaceutical ingredients (APIs) with tailored release profiles.
• Bioconjugation Reagent: Used for the site-specific modification of peptides, proteins, and antibodies, leveraging the reactive thioester group for coupling under mild conditions.
• Polymer Chemistry: Acts as a functional initiator or monomer in the synthesis of amphiphilic block copolymers, non-ionic surfactants, and PEG-based hydrogels.
• Surface Functionalization: Employed to create hydrophilic, protein-resistant, or bioactive coatings on medical devices, nanoparticles, and diagnostic substrates.
• Crosslinking Agent: Utilized in the formulation of crosslinked polymer networks for controlled drug delivery systems or tissue engineering scaffolds.
• Material Science Research: A critical tool for academic and industrial researchers exploring new macromolecular architectures and smart materials.

Basic Information

Item	Details
Product Name	tert-Butyl-3,6,9,12,15,18,21-Heptaoxa-34-Keto-33-Thiapentatriacontanoate
CAS No.	887353-86-8
Molecular Formula	C33H64O11S
Molecular Weight	668.92 g/mol
Synonyms	tert-Butyl-PEG7-thioacetate; 2,5,8,11,14,17,20-Heptaoxadotriacontane-22-thione, 1-(1,1-dimethylethyl) 22-thioate; TB-PEG7-Thioacetate; tert-Butyl ω-thioacetate heptaethylene glycol; PEG7-Thioacetic acid tert-butyl ester; 3,6,9,12,15,18,21-Heptaoxa-33-thiapentatriacontan-34-oic acid, 1,1-dimethylethyl ester
EINECS	Contact for details

Quality Control

Every batch of tert-Butyl-3,6,9,12,15,18,21-Heptaoxa-34-Keto-33-Thiapentatriacontanoate is manufactured under a strict quality management system. We employ advanced analytical techniques including NMR, HPLC, and mass spectrometry to verify identity, purity, and consistency. Certificates of Analysis (COA) with detailed specifications are provided for each lot, ensuring the material meets the rigorous standards required for pharmaceutical and advanced material applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C or as indicated on the label or COA. This compound is hygroscopic (moisture-sensitive). For long-term storage, consider storing under an inert atmosphere such as argon or nitrogen to maintain stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 1.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.